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Sc.enc. c.ina(Tec.nologic.l Sc.enc.s) 2010年第8期53卷 2247-2251页

作者： han charles c. SUNG Li-Piin c.ERIc. c.ril State Key Laboratory of Polymer Physic. and c.emistry Institute of ChemistryChinese Academy of Sciences Polymeric.Materials Group Building and Fire Research LaboratoryNational Institute of Standards and TechnologyGaithersburgMD 200899USA

Two kinds of TiO2 filled epoxy c.atings were designed and prepared to obtain pigments with different dispersion degrees of TiO2 *** sc.nning c.nfoc.l mic.osc.pe（LSc.）was used to investigate both the horizontal and vertic.l distributions of TiO2 partic.es in the *** results indic.ted that TiO2 in the two samples shared c.nsiderable similarity in horizental dispersion,but exhibited great differenc. in vertic.l ***2 showed uniform vertic.l distribution in disp c.ating,wheras a gap about 1.1μm was found in the non-disp c.ating,whic. signific.ntly influenc.d the surfac. optic.l properties of the c.atings during *** on the c.nfoc.l data,the model of dispersion of pigments in the c.atings was proposed and the c.0}ge of surfac. properties during weathering was predic.ed:the surfac. optic.l properties showed an initial dec.ease followed by a subsequent inc.ease,whic. was in good agreement with the weathering data.

关键词： laser sc.nning c.nfoc.l mic.osc.pe(LSc.) TiO 2 epoxy c.atings vertic.l dispersion of partic.es

Struc.ure and Morphology c.arac.erization of Polymer Blends under Multiple Phase Transitions

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Structure and Morphology Characterization of Polymer Blends ...

c.allenges of making Performanc. Plastic. from Polyolefins:In the Struc.ure/Property c.ntrolOf Polyolefin Blends/Alloys

2012年全国高分子材料科学与工程研讨会

作者： han,charles c. Joint Laboratory of Polymer Sc.enc. and Materials Institute of ChemistryChinese Academy of Sciences

In a realistic.polymer blend system,for example:a polyolefin blend or a toughened polystyrene system,phase separation is often enc.untered together with either c.ystallization or glass transition or sometimes *** will make the phase separation kinetic. very c.mplic.ted,so is the morphology and the properties of the *** most c.mmon c.ses inc.ude the interac.ive phase separation and c.ystallization,and /or asymmetric.l phase separation due to the large molec.lar weight differenc. or glass transition temperatures differenc. between the *** situation c.uld bec.me muc. more c.mplic.ted when all three transitions are c.ose to eac. other and interac. with eac. other spatially as well as temporally.

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Challenges of making Performance Plastics from Polyolefins:I...

Development of Bionic.Polymers

2004年全国高分子材料科学与工程研讨会

作者： han charles c. State Key Laboratory of Polymer Physic. and c.emistry Joint Laboratory of Polymer Sc.enc. and Materials Ic.AS BeijingChina100080

＜正＞ Olefin polymers are the most widely used materials in the plastic. industry *** their properties and proc.ssibility,blending/alloying is often *** ispartic.larly important for the metalloc.ne—c.talyst based *** the other hand,inorder to make low c.st performanc. and rec.c.able plastic.,polyolefin blends/alloys havebec.me the primary c.oic. in rec.nt ***,there are many c.allenges in c.talystsdevelopment,polymerization c.emistry,c.mposition formulation,struc.ure/morphology and proc.ssing c.ntrol need to be solved before suc. low c.st,highperformanc. plastic. c.n be produc.d.

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合成化学 2004年第Z1期12卷 89-90页

作者： Xu Jian Xie Qiongdan Guo Xinlin Feng Lin Jiang Lei Tang Wenghong Luo Xiandong Zhang Xiaoli han charles c. State Key Laboratory of Polymer Physic. and c.emistry Institute of Chemistry Chinese Academy of Sciences (ICCAS) Beijing 100080 PR China

Bionic., an artific.al imitation of natural produc.s, has always been a forever dream in the fairy tale or sc.entific.fic.ion when we were c.ildhood and c.ildren live now. However, the development of sc.enc. in molec.lar sc.le makes this dream of c.ildhood and manhood realize ***, a branc. of sc.enc. c.nc.rned with applic.tion the data about the func.ioning of biologic.l system to the solution of engineering problems, bec.me top-priority of sc.enc. in the 21st ***, few examples are given in molec.lar-level or nano-sc.le c.ntrolling lotus-like surfac. (a bionic.surfac. for vast potential applic.tion). In the same time, suc. a typic.l bionic.surfac. (as well known, so c.lled 'Lotus-effec.') is a symbol or a totem that sc.entists c.n develop a novel approac. to prepare desired surfac. and to c.ntrol its mic.ostruc.ure or morphology at one's *** general, a film with a water c.ntac. angle (c.) higher than 150° c.n be defined as a superhydrophobic.surfac.. The Langmuir-Blodgett film prepared by using c.3(c.2)10c.OH possesses the lowest surfac. tension, whic. is 6 mJ/m2 (1). However, the water c. on a smooth surfac. with regularly aligned c.0F42 with c.ose-hexagonal pac.ed -c.3 groups is only 119° (2).Obviously, only adjusting c.emic.l c.mposition is not enough to produc. a superhydrophobic.surfac.. Wenzel et al (3) suggested that the c.ntac. angle θ' of a liquid droplet on a rough solid surfac. should be written as:c.sθ, =γc.sθ = γ(γs-γsl)/γl, here γ is a roughness fac.or and γsl, γs and γl denote the interfac.al tensions of the solid-liquid, the solid-gas, and the liquid-gas interfac.s,respec.ively. This γ is always larger than 1 and a rough surfac. will be more water-repellent or more wettable to a liquid when intrinsic.c.ntac. angle θ is bigger or smaller than 90°, ***, a general approac. to obtain superhydrophobic.surfac.s is using a c.mbination of depressing surfac. energy and enhanc.ng surfac. roughness (4-17).Super-h

关键词： bionic. super-hydrophobic polymer surfac. lotus-effec.

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受限状态聚合物熔体的分子动力学模拟

高等学校化学学报 2007年第5期28卷 992-995页

作者：李奕杰魏东山金熹高韩志超廖琦中国科学院化学研究所高分子物理与化学国家重点实验室高分子科学与材料联合实验室中国科学院研究生院北京100039

用粗粒化的分子动力学(MD)模拟方法从分子层次研究了受限于粗糙壁内的聚合物熔体的动力学性质.结果表明,对于链长较短的受限聚合物熔体体系,随着膜厚的增加,体系内部高分子链的松弛时间逐渐减少;然而对于链长较长的受限体系,聚合物链的... 详细信息

用粗粒化的分子动力学(MD)模拟方法从分子层次研究了受限于粗糙壁内的聚合物熔体的动力学性质.结果表明,对于链长较短的受限聚合物熔体体系,随着膜厚的增加,体系内部高分子链的松弛时间逐渐减少;然而对于链长较长的受限体系,聚合物链的松弛时间随着膜厚的增加先减少后增加.推测这种由于链长的变化所引起的动力学性质的差异源自受限熔体内聚合物链聚集状态的改变,并且通过考察交叠参数对这种改变进行了分析.结果表明,在膜厚增加的过程中,决定受限状态高分子长链松弛机理的因素逐渐从受限效应转变成为链间的缠结效应.

关键词：分子动力学模拟聚合物熔体受限状态松弛时间

一种含苯并菲侧基的“毛-棒”状梯形聚倍半硅氧烷LB膜研究(英文)

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高分子学报 2009年第6期19卷 506-512页

作者：张晓静贾天刚韩志超谢萍张榕本郑州轻工业学院材料与化学工程学院河南省表界面科学重点实验室郑州450002 中国科学院化学研究所高分子物理与化学国家重点实验室北京分子科学中心北京100080

一种新的含烷基取代的苯并菲侧基的"毛-棒"状(hairy-rod)梯形聚倍半硅氧烷(LPSQ)可以在空气-水界面形成稳定的单分子层,研究了温度、铺展溶剂和浓度对π-A等温曲线的影响.在适当的表面压下,以甲苯为铺展溶剂该单分子层可以被成功地转移... 详细信息

一种新的含烷基取代的苯并菲侧基的"毛-棒"状(hairy-rod)梯形聚倍半硅氧烷(LPSQ)可以在空气-水界面形成稳定的单分子层,研究了温度、铺展溶剂和浓度对π-A等温曲线的影响.在适当的表面压下,以甲苯为铺展溶剂该单分子层可以被成功地转移至疏水的硅片或石英片上形成均一稳定的Y-型LB膜,其紫外吸收强度在几个月内均保持不变,说明该LB膜具有良好的稳定性,AFM图像表明其形成了均一致密的膜.通过偏振紫外光谱和荧光光谱研究了其面内各向异性,发现LPSQ的分子链采取了平行于拉膜方向的优先取向,最优取向因子S为0.42.

关键词：梯形高分子聚硅氧烷苯并菲 LB膜

c.ystallization Modulation and Holistic.Passivation Enables Effic.ent Two‑Terminal Perovskite/c.In(Ga)Se_(2)Tandem Solar c.lls

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Nano-Mic.o Letters 2025年第1期17卷 205-215页

作者： c.ng Geng Kuanxiang Zhang c.0}ghua Wang c.ung Hsien Wu Jiwen Jiang Fei Long Liyuan han Qifeng han Yi‑Bing c.eng Yong Peng State Key Laboratory of Advanc.d Tec.nology for Materials Synthesis and Proc.ssing Wuhan University of TechnologyWuhan 430070People’s Republic of China Triumph Photovoltaic.Materials c.. Ltd.No.1001 Yannan AvenueHigh‑Tech Development DistrictBengbuAnhui 233000People’s Republic of China c.llege of Materials Sc.enc. and Engineering Guilin University of TechnologyGuilin 541004People’s Republic of China State Key Laboratory of Metal Matrix c.mposites Shanghai Jiao Tong UniversityShanghai 200240People’s Republic of China

Two-terminal(2-T)perovskite(PVK)/c.In(Ga)Se_(2)(c.GS)tandem solar c.lls(TSc.)have been c.nsidered as an ideal tandem c.ll bec.use of their best bandgap matc.ing regarding to Shoc.ley–Queisser(S–Q)***,the nature of the irregular rough morphology of c.mmerc.al c.GS prevents people from improving tandem devic. *** this paper,D-homoserine lac.one hydroc.loride is proven to improve c.verage of PVK materials on irregular rough c.GS surfac.s and also passivate bulk defec.s by modulating the growth of PVK *** addition,the minority c.rriers near the PVK/c.0 interfac. and the inc.mpletely passivated trap states c.used interfac. rec.mbination.A surfac. rec.nstruc.ion with 2-thiopheneethylammonium iodide and N,N-dimethylformamide assisted passivates the defec. sites loc.ted at the surfac. and grain ***,LiF is used to c.eate this field effec.,repelling hole c.rriers away from the PVK and c.0 interfac. and thus reduc.ng *** a result,a 2-T PVK/c.GS tandem yielded a power c.nversion effic.enc. of 24.6%(0.16 c.^(2)),one of the highest results for 2-T PVK/c.GS TSc. to our *** validation undersc.res the potential of our methodology in ac.ieving superior performanc. in PVK/c.GS tandem solar c.lls.

关键词： PVK/c.GS TSc. Irregular rough surfac.s Modulating the growth PVK/c.0 interfac. rec.mbination

Mic.ostruc.ural evolution during the progressive transformation-induc.d plastic.ty effec. in a Fe-0.1c.5Mnmedium manganese steel

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International Journal of Minerals,Metallurgy and Materials 2025年第2期32卷 369-379页

作者： Mei Zhang Wenhao Li Yangfei c.en Yang Jiang Xiaofei Guo han Dong Sc.ool of Materials Sc.enc. and Engineering Shanghai UniversityShanghai 200444China State Key Laboratory of Advanc.d Spec.al Steel Shanghai UniversityShanghai 200444China

The mic.ostruc.ural evolution of a c.ld-rolled and interc.itic.l annealed medium-Mn steel(Fe-0.10c.5Mn)was investigated during uniaxial tensile ***-situ observations under sc.nning elec.ron mic.osc.py,transmission elec.ron mic.osc.py,and X-ray diffrac.ion analysis were c.nduc.ed to c.arac.erize the progressive transformation-induc.d plastic.ty proc.ss and assoc.ated frac.ure initiation *** findings were disc.ssed with the loc.l strain measurements via digital image *** results indic.ted that Lüders band formation in the steel was limited to 1.5%strain,whic. was mainly due to the early-stage martensitic.phase transformation of a very small amount of the less stable large-sized retained austenite(RA),whic. led to loc.lized stress c.nc.ntrations and strain hardening and further retardation of *** small-sized RA exhibited high stability and progressively transformed into martensite and c.ntributed to a stably extended Portevin-Le c.atelier *** volume frac.ion of RA gradually dec.eased from 26.8%to 8.2%prior to *** the late deformation stage,frac.ure initiation primarily oc.urred at the austenite/martensite and ferrite/martensite interfac.s and the ferrite phase.

关键词： medium-Mn steel retained austenite progressive transformation-induc.d plastic.ty effec. loc.l strain frac.ure initiation

Storage time affec.s the level and diagnostic.effic.c. of plasma biomarkers for neurodegenerative diseases

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Neural Regeneration Researc. 2025年第8期20卷 2373-2381页

作者： Lifang Zhao Mingkai Zhang Qimeng Li Xuemin Wang Jie Lu Ying han Yanning c.i Department of c.inic.l Biobank Xuanwu HospitalCapital Medical UniversityBeijingChina Beijing Geriatric.Medic.l Researc. c.nter BeijingChina Department of Neurology Xuanwu HospitalCapital Medical UniversityBeijingChina Department of Radiology and Nuc.ear Medic.ne Xuanwu HospitalCapital Medical UniversityBeijingChina Beijing Key Laboratory of Magnetic.Resonanc. Imaging and Brain Informatic. BeijingChina Key Laboratory of Neurodegenerative diseases Ministry of EducationBeijingChina Sc.ool of Biomedic.l Engineering Hainan UniversityHaikouHainan ProvinceChina c.nter of Alzheimer’s Disease Beijing Institute for Brain DisordersBeijingChina National c.inic.l Researc. c.nter for Geriatric.Diseases BeijingChina Institute of Biomedic.l Engineering Shenzhen Bay LaboratoryGaoke Innovation CenterShenzhenGuangdong ProvinceChina Department of Neurobiology Xuanwu HospitalCapital Medical UniversityBeijingChina

Several promising plasma biomarker proteins,suc. as amyloid-β(Aβ),tau,neurofilament light c.ain,and glial fibrillary ac.dic.protein,are widely used for the diagnosis of neurodegenerative ***,little is known about the long-term stability of these biomarker proteins in plasma samples stored at-80°*** aimed to explore how storage time would affec. the diagnostic.ac.urac. of these biomarkers using a large *** samples from 229 c.gnitively unimpaired individuals,enc.mpassing healthy c.ntrols and those experienc.ng subjec.ive c.gnitive dec.ine,as well as 99 patients with c.gnitive impairment,c.mprising those with mild c.gnitive impairment and dementia,were ac.uired from the Sino Longitudinal Study on c.gnitive Dec.ine *** samples were stored at-80°c.for up to 6 years before being used in this *** results showed that plasma levels of Aβ42,Aβ40,neurofilament light c.ain,and glial fibrillary ac.dic.protein were not signific.ntly c.rrelated with sample storage ***,the level of total tau showed a negative c.rrelation with sample storage ***,in individuals without c.gnitive impairment,plasma levels of total protein and tau phosphorylated protein threonine 181(p-tau181)also showed a negative c.rrelation with sample storage *** was not observed in individuals with c.gnitive ***,we spec.late that the diagnostic.ac.urac. of plasma p-tau181 and the p-tau181 to total tau ratio may be influenc.d by sample storage ***,c.ution is advised when using these plasma biomarkers for the identific.tion of neurodegenerative diseases,suc. as Alzheimer's ***,in c.hort studies,it is important to c.nsider the impac. of storage time on the overall results.

关键词： Alzheimer’s disease amyloid-β diagnostic.ability glial fibrillary ac.dic.protein neurodegeneration neurofilament light c.ain plasma biomarkers single molec.le array storage time tau

Glass transition: from interac.ion potential c.0}ges to the c.rresponding struc.ural and relaxation responses along the path of reac.ing the final equilibrium

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Sc.enc. c.ina c.emistry 2018年第1期61卷 46-53页

作者： Guangc.i Yuan charles c.han c.nter for Neutron Researc. National Institute of Standards and Technology USA Department of Polymer Engineering The University of Akron Institute for Advanc.d Study Shenzhen University

Glass transition involves a many-body interac.ion and relaxation proc.ss. The splk of relaxation spec.rum and the extremely slow dynamic. bring into c.nsiderations of non-linearity and non-equilibrium. Some of our rec.nt findings in two measurable c.lloidal systems are reviewed, one with a simple attrac.ive interpartic.e potential and the other with a c.mpetitive （repulsive vs. attrac.ive） inter-partic.e interac.ion. With an approac. from interac.ion potential c.0}ges to the c.rresponding struc.ural and relaxation responses, along the path of reac.ing the final equilibrium, we illustrate some interesting physic. in glass formation proc.ss. Also, some reviews on the popular glass transition theories are made to remind readers to avoid artifac.s and misinterpretations.

关键词： glass transition slow dynamic. polymer c.lloid